/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controller;

import dao.TaiKhoanDAO;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import pojo.Taikhoan;

/**
 *
 * @author admin
 */
@WebServlet(name = "login", urlPatterns = {"/login.do"})
public class login extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            if (request.getCharacterEncoding() == null) {
                request.setCharacterEncoding("UTF-8");
            }

            HttpSession session = request.getSession();
            if (session.getAttribute("taiKhoan") != null) {
                response.sendRedirect("index.do");
                return;
            }

            String url = "login.jsp";

            if (request.getParameter("returnPage") != null) {
                session.setAttribute("returnPage", request.getParameter("returnPage"));
            }

            if (request.getParameter("log_in") != null) {
                String tenTK = request.getParameter("user_name");
                String matKhau = request.getParameter("password");

                request.setAttribute("tenTK", tenTK);
                request.setAttribute("matKhau", matKhau);

                if (!TaiKhoanDAO.KiemTraTonTai(tenTK)) {
                    request.setAttribute("message", "Tên tài khoản không tồn tại. Vui lòng thử lại!");
                } else {
                    Taikhoan taiKhoan = new Taikhoan();
                    taiKhoan = TaiKhoanDAO.DangNhap(tenTK, matKhau);

                    if (taiKhoan != null) {
                        session.setAttribute("taiKhoan", taiKhoan);
                        request.setAttribute("message", "Chúc mừng bạn đã đăng nhập thành công vào <a href='index.do'>P2TBid</a> ! Hi vọng bạn sẽ có những phút giây vui vẻ khi tham gia đấu giá và giành được những món hàng quý giá !");

                        url = "index.do";

                        if (session.getAttribute("returnPage") != null) {
                            url = (String) session.getAttribute("returnPage");
                            response.sendRedirect(url);
                            return;
                        }

                    } else {
                        request.setAttribute("message", "Mật khẩu không đúng. Vui lòng thử lại!");
                    }
                }
            }

            RequestDispatcher rd = request.getRequestDispatcher(url);
            rd.forward(request, response);
        } catch (Exception ex) {
            response.sendRedirect("errorpage.do");
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
